Publications by authors named "Liang-di Xie"

Article Synopsis
  • The study explored the effect of inhibiting SGLT1 on frailty and sarcopenia in older adults, aiming to understand its potential benefits.
  • A two-sample Mendelian randomization analysis showed that SGLT1 inhibition led to a decrease in frailty index and a lower risk of weak grip strength in individuals aged 60 and over.
  • Findings identified insulin resistance and various proteins and metabolites as mediators, suggesting that targeting SGLT1 could be a promising therapeutic approach for improving health in older adults.
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Background: There is currently a lack of a precise, concise, and practical clinical prediction model for predicting coronary artery disease (CAD) in patients with essential hypertension (EH). This study aimed to construct a nomogram to predict CAD in patients with EH based on flow-mediated dilation (FMD) of brachial artery and traditional risk factors.

Methods: Clinical data of 1752 patients with EH were retrospectively collected.

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In China, automated blood pressure monitors have been readily available for home use. Home blood pressure monitoring has been indispensable in the management of hypertension. There is therefore a need to establish guidelines for home blood pressure monitoring on the basis of the 2012 consensus document.

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Objective: Sick sinus syndrome (SSS) is one of the most common causes of cardiac impairment necessitating pacemaker implantation. However, studies of SSS pathogenesis are neither comprehensive nor conclusive due to limited success in achieving a stable rat SSS model. Here, we modified pinpoint press permeation to establish a stable rat SSS model.

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Prehypertensive losartan treatment may lead to long‑term inhibition of the development of left ventricular hypertrophy (LVH) in spontaneously hypertensive rats (SHRs). However, the underlying mechanism has yet to be fully elucidated. The aim of the present study was to investigate the expression of angiotensin type 1 receptor-associated protein (ATRAP/Agtrap) and methylation of the Agtrap gene in the myocardium following the withdrawal of treatment.

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Abnormal phenotypic switch of vascular smooth muscle cell (VSMC) is a hallmark of vascular disorders such as atherosclerosis and restenosis. And this process has been related to remodeling of L-type calcium channel (LTCC). We attempted to investigate whether fluvastatin has any effect on VSMC proliferation and LTCCα 1C subunit (LTCCα 1C) expression as well as the potential mechanisms involved.

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Increased expression of the p22(phox) subunit of the NADPH oxidase complex may possibly contribute to both the enzyme׳s increased activation and the occurrence of oxidative stress during hyperhomocysteinaemia. However, the activation of peroxisome proliferator-activated receptor (PPAR) δ has been shown to inhibit p22(phox) expression. The purpose of this study was to elucidate the signaling pathway by which PPARδ activation regulated homocysteine-induced expression of p22(phox).

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The objective of this study was to examine the role of heat shock protein 27 (HSP27) in proliferation and migration of vascular smooth muscle cells (VSMCs). Three complementary DNA sequences targeting rat HSP27 gene were designed, synthesized, and subcloned into lentiviral vector. The interfering efficiency was detected by reverse transcriptase-polymerase chain reaction and Western blot.

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Article Synopsis
  • Tissue kallikrein 1 (hTK1) reduces the growth of vascular smooth muscle cells (VSMCs) stimulated by platelet-derived growth factor-BB (PDGF-BB) in rats, suggesting its potential role in preventing neointimal hyperplasia.
  • The study showed that hTK1 gene delivery inhibited VSMC proliferation in a time- and dose-dependent manner, achieving a maximum growth inhibition of 36.3% over 72 hours.
  • The mechanism of hTK1's effect includes increasing levels of cell cycle inhibitors p27(Kip1) and p21(Cip1), while blocking these effects with a specific receptor antagonist, icatibant, suggests that the inhibition is mediated through brady
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Article Synopsis
  • The study aimed to examine how atorvastatin affects the expression of MCP-1 in HUVECs when induced by AGEs, and its relationship to PPAR-γ and NF-κB signaling pathways.
  • Results indicated that higher levels of AGEs increased MCP-1 expression, but atorvastatin was able to reduce this effect in a dose-dependent manner.
  • Additionally, AGEs decreased PPAR-γ levels and increased NF-κB protein expression, with atorvastatin blocking these changes, demonstrating a potential mechanism for its protective effects.
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Objective: Tissue kallikrein cleaves kininogen substrate to produce vasoactive kinin peptides that have been implicated in the proliferation of vascular smooth muscle cells. We investigated the effects of adenovirus-mediated human tissue kallikrein (Ad-hKLK1) gene delivery on the proliferation of vascular smooth muscle cells of SHR (VSMCs(SHR)) induced by platelet derived growth factor-BB (PDGF-BB).

Methods: Primary VSMCs(SHR) were isolated and cultured from thoracic aorta of male SHR.

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Objective: To investigate the effects of adenovirus-mediated human tissue kallikrein (Ad-hKLK1) gene transfer on platelet-derived growth factor-BB (PDGF-BB)-induced migration of vascular smooth muscle cells from spontaneously hypertensive rats (VSMC(SHR)).

Methods: A bicistronic recombinant adenovirus vector (Ad-hKLK1) carrying the target hKLK1 gene and the reporter gene EGFP was constructed. VSMCs isolated from the thoracic aorta of male SHR were passaged, and the quiescent VSMC(SHR) in passages 3-6 seeded in 6-well plates were treated with Ad-hKLK1 and control virus.

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Objective: To investigate the effects of human tissue kallikrein 1(Ad-hKLK1) gene delivery on the neointima formation in carotid arteries of spontaneously hypertensive rats (SHRs).

Methods: Carotid artery restenosis was induced in male SHR rats by balloon-injury. Rats were randomly assigned into 4 groups: Sham-operated (n = 6); Angioplasty (phosphate buffered solution 50 microl, n = 8); Vector virus (control virus, 1 x 10(9) IU in 50 microl, n = 8) and Ad-hKLK1(Ad-hKLK1, 1 x 10(9) IU in 50 microl, n = 8).

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The objective of this study is to investigate the signal transduction pathways that regulate heat shock protein 27 (HSP27) phosphorylation and migration of vascular smooth muscle cells (VSMCs) from spontaneously hypertensive rats (SHR) induced by angiotensin II (AngII) and platelet derived growth factor-BB (PDGF-BB). The activity of HSP27 was evaluated by Western blot with specific phospho-HSP27 antibody. F-actin polymerization was detected by FITC-Phalloidine staining using confocal microscopy.

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Objective: The aim of the present study was to investigate the role of heat shock protein 27 (HSP27) phosphorylation in the migration of vascular smooth muscle cells (VSMCs) induced by angiotensin II (AngII) and platelet derived growth factor-BB (PDGF-BB).

Methods: The activity of HSP27 was evaluated by Western blot with specific phospho-HSP27 antibody. F-actin polymerization was detected by FITC-Phalloidine staining using confocal microscopy.

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Aim: To examine the regulatory effects of angiotensin II (Ang II) on the phosphorylation of 4E-binding protein 1 (4E-BP1) and p70 S6 kinase in cultured vascular smooth muscle cells (VSMC), and the contribution of phosphatidylinositol 3-kinase (PI3K)/protein kinase B (PKB) signaling pathway in this process.

Methods: VSMC obtained from rat thoracic aortas were cultured. The phosphorylation of 4E-BP1 and p70 S6 kinase was detected by immunoblotting.

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